flameer Bread Adjustable Portable Sour Starter Warmer Sour Warmer for 30L.Bread making proofing box is made of aluminum film and soft materials. It has fine workmanship and tight stitching. It can retain heat for a long time and is .Foldable bread can be folded and stored when not in use. It does not take up space. It has a handle and is easy to carry.Heating pad will not affect the taste of food during proofing, heat protection to ensure safe use.Fermenting Warming Mat, 3 layers of thickened, food grade aluminum foil, thickened pearl cotton, non woven fabric, better thermal insulation effect.Multifunction proofing box can be used for various foods such as bread, yogurt, chocolate, cheese, cultured butter, kombucha, tempeh etc., bringing great convenience to your life.Bread warming mat Heater. Sour Fermenting Warming Mat for Bread Making. Bread Warming Box Temperature Fermenting Bag. Sour Starter Warmer heat preservation. Foldable Proofing Box with handle zipper design.